package com.atguigu.springcloud.service.impl;

import com.atguigu.springcloud.service.MessageProviderService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.stream.annotation.EnableBinding;
import org.springframework.cloud.stream.annotation.Output;
import org.springframework.cloud.stream.messaging.Source;
import org.springframework.messaging.MessageChannel;
import org.springframework.messaging.support.MessageBuilder;
import org.springframework.stereotype.Service;

import java.util.UUID;
@Slf4j
@EnableBinding({Source.class}) //定义消息的推送管道
public class MessageProviderServiceImpl implements MessageProviderService {

    @Autowired
    private MessageChannel output; //消息发送管道

    @Override
    public String send() {
        String serial = UUID.randomUUID().toString();
        output.send(MessageBuilder.withPayload(serial).build());
        log.info("***** serial："+serial);
        return null;
    }
}
